Programmable filter for photoacoustic experiments

Tomasz Starecki; Marcin Grajda

doi:10.1117/12.714770

12 October 2006 Programmable filter for photoacoustic experiments

Tomasz Starecki, Marcin Grajda

Proceedings Volume 6347, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2006; 63471G (2006) https://doi.org/10.1117/12.714770
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2006, 2006, Wilga, Poland

Abstract

The paper describes a design, test circuit and preliminary test results of a programmable filter dedicated to photoacoustic experiments. The filter was implemented as a state variable filter with independent digital control of top and bottom corner frequencies as well as quality factor. In order to perform frequency response measurements a dedicated miniature automatic measurement system was designed. The system was based on digital direct synthesis of the input sine wave and true-RMS detection of the output signal.

Citation Download Citation

Tomasz Starecki and Marcin Grajda "Programmable filter for photoacoustic experiments", Proc. SPIE 6347, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2006, 63471G (12 October 2006); https://doi.org/10.1117/12.714770

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